President Trump addresses nation after mass shooting at Florida SchoolWhite House

He also threatened to join the Taliban insurgency if the United States continues pushing him publicly to do more to end graft, cronyism and electoral fraud, comments that stunned U.S. officials.

"We certainly would evaluate whatever continued or further remarks President Karzai makes, as to whether that's constructive to have such a meeting, sure," White House spokesman Robert Gibbs told reporters Tuesday.